Police believe they have found the driver involved in a hit-and-run incident in Wainuiomata last night but say no charges have yet been laid.

The incident occurred in Norfolk Street, between Wellington Road and Upper Fitzherbert Road about 10.30pm.

Police central communications shift commander Bruce Mackay said the male victim had been knocked down by a car which had left the area.

Detective Senior Sergeant Scott Cooper of the Lower Hutt CIB said inquiries were ongoing and police had spoken to and released the people they believed were involved. He said charges were possible but would not be laid in the next day or two.

Police were now focused on the movements of the 17-year-old Wainuiomata man who had been hit.

He was in a serious but stable condition in Wellington Hospital's intensive care unit but was expected to be transferred to a ward later today.

The incident happened outside the home of Michael Alofi, 17, who ran outside when he heard a bang from his room. He was first on the scene and helped to call emergency services and direct traffic.

"I saw the guy and he had a head wound. It was pretty much just chaos. There was heaps of fog so we couldn't hardly stop traffic."

His father Pauliasi Alofi said the man was out cold but people were helping him with blankets and putting him in the recovery position.

"He was lying in the middle of the street. I was busy trying to manage the traffic."